I put this on the sink in my shop. First off, it did not work at all. I then found that the factory side of the wiring that goes into the junction block was never connected in the block. I fixed that, then. With the high/low switch on high, if I run the water as slow as I can, so the valve in this heater opens to turn on the heater, it will WARM up the water. It does not make any HOT water. I wasn't expecting this to heat the water to hot, but it barley warms it. Maybe only one leg of the 240v system is working. I have about 16 days left in my 30 return window to decide what to do with this not very impressive unit.Here is an update. I contacted Bosch, and talked to Matt (multiple times) in the tech dept, who was very helpful. After some testing on the unit, it was determined that the wire that should be connected to the heating coil, was not. It looked like it was, but was hidden under the wire cover. He wanted me to ship this back to Bosch. I noticed that the box it came in had an X drawn in pen on the front, and what appeared to be a defective merchandise label on it. I think someone else bought this unit, it didn't work, and returned it to revain, who then resold it to me. Bosch sent me a new one, and this one came with the factory wires in the junction block not connected, and a screw holding the heating unit to the backing plate was stripped out and floating around the unit. They sent me another one, and this one seems to be working much better. You can't run the water wide open, but slow it down a little and it warms the water good enough for hand washing. Matt said there have been a lot of assembly problems, that they are trying to fix. Maybe some of the other bad reviews here had this same problem. Call Bosch and they will work with you to get it fixed.
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